A detection tool for detecting a hole position of an automobile door panel

Abstract

The utility model relates to automobile manufacturing detection equipment technical field, especially a kind of detection tool for automobile door panel hole position detection, overall installation is in detection tool base.The base is rectangular metal structure, rear side is equipped with door panel positioning support, for the measured door panel is positioned and clamped fixed in three directions according to installation vehicle posture.The base middle part is provided with hole position detection module, and this module includes guiding sleeve, detection needle, signal trigger lever and displacement detection sensor in turn, for the displacement detection and deviation output to door panel assembly hole position.The base front edge is equipped with boundary detection module, including guide rail sliding table and servo motor and screw rod transmission mechanism, and linear laser scanning head is installed on sliding table, realize the non-contact scanning of door panel outer contour.Control and display module are provided on the front side of base, for collecting and processing hole position and boundary data, output deviation detection result.The utility model can complete hole position detection and boundary scanning on the same platform, and structure is compact, convenient to change type and high detection precision.

Description

Technical Field

[0001] This utility model relates to the field of automotive manufacturing testing equipment technology, and in particular to a tool for detecting hole positions in automotive door panels. Background Technology

[0002] In the manufacturing process of automotive body-in-white, the door panel, as an important component of the exterior body covering, directly affects the assembly quality and appearance consistency of the entire vehicle due to its installation accuracy. Door panels typically have various mounting holes for installing components such as hinges, door locks, limit blocks, seals, and trim panels. The dimensional accuracy, positional accuracy, and spatial relationship between these holes are key inspection indicators for controlling the quality of body assembly.

[0003] In existing technologies, door panel hole position detection mainly relies on manual insertion of pins or manual gauges for measurement. This process is labor-intensive, inefficient, and the results are heavily influenced by the operator's experience, making data digitization and standardization difficult. Furthermore, to detect the outer contour shape and boundary dimensions of the door panel, a coordinate measuring machine or laser scanning platform is often required for independent measurement, leading to frequent equipment switching, complex inspection procedures, and long workstation occupancy times. Therefore, designing a fixture for detecting hole positions in automotive door panels is essential. Utility Model Content

[0004] The purpose of this invention is to provide a tool for detecting hole positions in automotive door panels, in order to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a tool for detecting hole positions in automotive door panels, comprising a tool base, a door panel positioning bracket, a hole position detection module, a boundary detection module, and a control and display module; the tool base is a rectangular metal structure with an upper surface forming an installation reference surface, a cable routing groove inside, and adjustable feet at the four corners; the door panel positioning bracket is fixedly installed on the rear side of the tool base, including a vertical support column and a horizontal mounting plate, the mounting plate having a positioning pin and a limiting block for three-way positioning and clamping of the door panel to be tested; the hole position detection module is located in the middle of the tool base, corresponding to the hole position of the door panel to be tested, and the module sequentially includes a guide sleeve, a detection pin, a signal trigger rod, and a displacement... The detection sensor has a guide sleeve vertically fixed to the module housing. The detection needle slides axially along the guide sleeve and is connected to the signal trigger rod. The probe of the displacement detection sensor contacts the end of the signal trigger rod to detect the axial displacement of the detection needle. The boundary detection module is arranged at the front edge of the fixture base and includes a guide rail slide, a servo motor, and a lead screw transmission mechanism. A slider is provided on the guide rail slide, and a line laser scanning head is fixed at the front end of the slider. The servo motor drives the slider to reciprocate linearly along the guide rail slide through the lead screw transmission mechanism to achieve non-contact scanning of the outer contour of the door panel. The control and display module is installed on the front side of the fixture base and is electrically connected to the displacement detection sensor and the line laser scanning head through cables to collect hole position and boundary detection signals and output deviation detection results.

[0006] According to the above technical solution, an elastic reset mechanism is provided between the guide sleeve and the detection needle to return the detection needle to the upper limit position when it is not in the detection state.

[0007] According to the above technical solution, the servo motor and the lead screw transmission mechanism are connected by a coupling.

[0008] According to the above technical solution, the control and display module has a built-in industrial control motherboard and signal acquisition board, which can perform time synchronization and coordinate registration of hole displacement data and boundary point cloud data.

[0009] According to the above technical solution, the positioning pins and limiting blocks on the door panel positioning bracket can be replaced or their positions adjusted according to the door panel model.

[0010] Compared with existing technologies, the beneficial effects achieved by this utility model are as follows: This utility model integrates hole position detection and boundary detection of the door panel on the same platform by setting up a fixture base, a door panel positioning bracket, a hole position detection module, a boundary detection module, and a control and display module. Specifically, the hole position detection module adopts a combination structure of a guide sleeve, a detection needle, a signal trigger rod, and a displacement detection sensor, enabling high-precision detection of hole depth and position deviation; the boundary detection module utilizes a guide rail slide, a servo motor, and a lead screw transmission mechanism to drive a linear laser scanning head to scan along the outer edge of the door panel, quickly obtaining point cloud data of the door panel's outer contour; the control and display module synchronously acquires and processes the hole position displacement signal and the boundary point cloud signal, outputting the hole position deviation value and the boundary deviation curve, achieving automated detection. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a tool for detecting hole positions in automotive door panels proposed in this utility model; Figure 2 This is a cross-sectional view of the hole position detection module in a tool for detecting hole positions in automotive door panels, as proposed in this utility model.

[0012] In the diagram: 1. Base, 2. Door panel positioning bracket, 3. Hole detection module, 31. Guide sleeve, 32. Detection pin, 33. Signal trigger rod, 34. Displacement detection sensor, 4. Boundary detection module, 41. Guide rail slide, 42. Servo motor and lead screw transmission mechanism, 5. Control and display module, 6. Door panel. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Example: Reference Figure 1-2A tooling for detecting hole positions in automotive door panels is disclosed. The tooling is mounted integrally on a tooling base 1, which is a rectangular metal structure. The upper surface is precision-ground to form an installation reference surface. Cable routing grooves are pre-drilled inside, and adjustable feet are provided at the four corners for leveling. A door panel positioning bracket 2 is fixed to the rear of the base 1. This bracket includes a vertical support column and a horizontal mounting plate. Positioning pins and limit blocks are arranged on the mounting plate to perform three-dimensional positioning of the door panel 6 to be tested according to its vehicle mounting posture and to clamp it with quick-locking mechanisms, ensuring spatial stability during the testing process.

[0015] A hole position detection module 3 is installed in the middle of the base 1, which is aligned with the target hole position of the door panel 6. The hole position detection module 3 includes, in sequence, a guide sleeve 31, a detection needle 32, a signal trigger rod 33, and a displacement detection sensor 34. The guide sleeve 31 is vertically fixed on the module housing, and its inner hole is precision ground to guide the axial sliding of the detection needle 32. The detection needle 32 is a slender rod with a rounded chamfer at the lower end to avoid scratching the hole wall. Its upper end is connected to the signal trigger rod 33 by a thread. An elastic reset mechanism is provided between the guide sleeve 31 and the detection needle 32 to allow the detection needle to return to its upper limit position when not in a detection state. The displacement detection sensor 34 is installed above the guide sleeve 31, and its measuring rod makes point contact with the end of the signal trigger rod 33 to measure the axial displacement of the detection needle 32 and output an electrical signal.

[0016] A boundary detection module 4 is arranged at the front edge of the base 1 for non-contact scanning of the outer contour boundary of the door panel 6. The boundary detection module 4 includes a guide rail slide 41 arranged along the outer edge of the door panel 6 and a servo motor and lead screw transmission mechanism 42 installed at one end of the guide rail. A slider seat is provided on the guide rail slide 41. The slider moves linearly back and forth with the lead screw and nut pair. A linear laser scanning head is fixed at the front end of the slider. Its emitting end face faces the outer edge area of ​​the door panel 6 to form a fan-shaped laser light strip, and the reflected light strip is collected by the imaging module to obtain the boundary section coordinate points in real time. The servo motor and lead screw transmission mechanism 42 drive the lead screw to rotate through a coupling to realize constant speed or variable speed scanning of the scanning head along the guide rail slide 41. The scanning head signal line is laid along the guide rail via a flexible drag chain and connected to the control system.

[0017] The control and display module 5 is installed on the front side of the base 1. This module has a built-in industrial control motherboard and signal acquisition board. It is electrically connected to the displacement detection sensor 34 and the scanning head / encoder of the boundary detection module 4 through cables. It is used to synchronously collect hole displacement data and boundary point cloud data, perform comparison calculation with CAD benchmark, and display hole deviation value, boundary deviation curve and pass / fail judgment on the touch screen. The detection data can be exported via USB or industrial Ethernet to form a detection report.

[0018] The workflow is as follows: The door panel 6 to be tested is clamped in the door panel positioning bracket 2 and locked. After the system is started, the detection needle 32 of the hole position detection module 3 is inserted vertically into the hole position of the door panel under the action of elastic preload. When the designed depth is reached, the signal trigger rod 33 pushes the probe of the displacement detection sensor 34 to generate displacement and output the corresponding hole position deviation signal. At the same time, the boundary detection module 4 is started, and the servo motor and the lead screw transmission mechanism 42 drive the slider to move along the guide rail slide 41. The line laser scanning head acquires the point cloud coordinates of the outer boundary of the door panel 6. The control and display module 5 performs time synchronization and coordinate registration of the two data channels and outputs the comprehensive detection result of hole position deviation and boundary contour deviation. With the above structure, the fixture completes hole position detection and boundary scanning on the same platform. When changing models, only the position of the positioning part of the door panel positioning bracket 2 and the hole position detection module 3 need to be adjusted, thus improving both detection efficiency and accuracy.

[0019] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0020] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A gauge for detecting hole positions in automotive door panels, characterized in that, It includes a fixture base (1), a door panel positioning bracket (2), a hole detection module (3), a boundary detection module (4), and a control and display module (5); The fixture base (1) is a rectangular metal structure with an installation reference surface on the upper surface, a cable routing groove inside, and adjustable feet at the four corners. The door panel positioning bracket (2) is fixedly installed on the rear side of the inspection base (1), including a vertical support column and a horizontal mounting plate. The mounting plate is provided with positioning pins and limiting blocks for three-way positioning and clamping of the door panel (6) to be tested. The hole position detection module (3) is located in the middle of the fixture base (1) and corresponds to the hole position of the door panel (6) being tested. The module includes a guide sleeve (31), a detection needle (32), a signal trigger rod (33), and a displacement detection sensor (34) in sequence. The guide sleeve (31) is vertically fixed on the module housing. The detection needle (32) slides along the axial direction of the guide sleeve (31) and is connected to the signal trigger rod (33). The probe of the displacement detection sensor (34) contacts the end of the signal trigger rod (33) to detect the axial displacement of the detection needle (32). The boundary detection module (4) is arranged on the front edge of the fixture base (1), including a guide rail slide (41) and a servo motor and a lead screw transmission mechanism (42). A slider is provided on the guide rail slide (41), and a linear laser scanning head is fixed at the front end of the slider. The servo motor drives the slider to move linearly back and forth along the guide rail slide (41) through the lead screw transmission mechanism (42) to realize non-contact scanning of the outer contour of the door panel. The control and display module (5) is installed on the front side of the fixture base (1) and is electrically connected to the displacement detection sensor (34) and the line laser scanning head via cables. It is used to collect hole position and boundary detection signals and output deviation detection results.

2. The inspection tool for detecting hole positions in an automotive door panel according to claim 1, characterized in that, An elastic reset mechanism is provided between the guide sleeve (31) and the detection needle (32) to return the detection needle (32) to the upper limit position when it is not in the detection state.

3. The inspection tool for detecting hole positions in an automotive door panel according to claim 1, characterized in that, The servo motor is connected to the lead screw transmission mechanism (42) via a coupling.

4. The inspection tool for detecting hole positions in an automotive door panel according to claim 1, characterized in that, The control and display module (5) has a built-in industrial control motherboard and signal acquisition board, which can perform time synchronization and coordinate registration of hole displacement data and boundary point cloud data.

5. A gauge for detecting hole positions in an automotive door panel according to claim 1, characterized in that, The positioning pins and limiting blocks on the door panel positioning bracket (2) can be replaced or their positions adjusted according to the door panel model.

Images